question_answer 58)

  Meena draws magnetic field lines of field close to the axis of a current carrying circular loop. As she moves away from the centre of the circular loop she observes that the lines keep on diverging. How will you explain her observation?

Answer:

                  We know that the magnetic field is stronger near the current carrying conductor and decreases as we move away from the conductor. In case of a current carrying circular loop, the magnetic field is stronger near the periphery, but weaker near the centre of the loop. Due to this, the magnetic field lines appear as straight lines near the centre. As we move towards the periphery of the circular loop, the magnetic field lines appear to be diverging so that they can be circular around the wire of the loop.